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Help get 4.0 GHz stable on i5 750 - Page 2

post #11 of 45
Quote:
Originally Posted by yellowbeast View Post
you must have a very good chip and I got a bad one... either way I will try what you are suggesting... going with these configs:

Vcore1,3 (1,28)
VTT1,31
PCH1,05
PLL1,8
vDimm1,66
tip..some times instead of increasing your PLL its helpful to lower it by a notch..it worked for me(i did manage to lower it til 1.72)..i don't find anything weird from the posted settings above..if you are on a dual GPU setup adding up more PCH voltage is helpful else staying on stock or a notch higher will do..

HTH
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post #12 of 45
Thread Starter 
PCH and PLL is set on Auto and the above specc did not work for me.. it made my computer freeze 30 seconds into Linx. I am not running with 2 gpu, but I can try raise PLL a bit with the same spec as below...

I also just did another test with these spec:
Vcore1,325(1,296-1,312)
VTT1,31
PCH1,05
PLL1,8
vDimm1,66
Error Linx (5:20)

did not work for me either.. it just feels like I am ending getting up to a higher Vcore in the end, which is very unfortunate
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post #13 of 45
Quote:
Originally Posted by yellowbeast View Post
PCH and PLL is set on Auto and the above specc did not work for me.. it made my computer freeze 30 seconds into Linx. I am not running with 2 gpu, but I can try raise PLL a bit with the same spec as below...

I also just did another test with these spec:
Vcore1,325(1,296-1,312)
VTT1,31
PCH1,05
PLL1,8
vDimm1,66
Error Linx (5:20)

did not work for me either.. it just feels like I am ending getting up to a higher Vcore in the end, which is very unfortunate
your chip is holding you all out..for just a 4ghz..i see no problem with your specs either with your settings..either way don't use too much VTT..try out 1.27v for vtt and more vcore like 1.35v..the rest should be in auto..report back for your progress..
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post #14 of 45
Thread Starter 
Vcore1,3625V(1,344 CPU-Z)
VTT1,27
PCH1,05
PLL1,8
vDimm1,66
Error Linx (7:4)

Failed the test again however it lasted a bit longer than the rest. I will take that as an improvement while all the other test failed. Perhaps lower VTT to see any difference...?

My chip is damn persistent..
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post #15 of 45
Quote:
Originally Posted by yellowbeast View Post
Vcore1,3625V(1,344 CPU-Z)
VTT1,27
PCH1,05
PLL1,8
vDimm1,66
Error Linx (7:4)

Failed the test again however it lasted a bit longer than the rest. I will take that as an improvement while all the other test failed. Perhaps lower VTT to see any difference...?

My chip is damn persistent..

do 1.35v core and less VTT..like 1.25v..i'm here to assist..
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post #16 of 45
Thread Starter 
Vcore1,3625V(1,344)
VTT1,25
PCH1,05
PLL1,8
vDimm1,66
Error Linx (5:15)

Failed again this time almost 2 min earlier if the times does matter at all. Glad with the support..thank you but still no stability point yet.

EDIT: Any suggestions? Perhaps increase Vcore again? And as you can tell I am kind of new into overclocking so I am a bit insecure of the procedure
Edited by yellowbeast - 6/2/11 at 8:56am
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post #17 of 45
Might try backing off the vDimm. 1.60 -1.64v. More isn't always better.

Still don't see where you said what baseclock, cpu ratio and memory frequency you are going for. Assuming 200 X 20 @ 1600MHz.
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post #18 of 45
Quote:
Originally Posted by yellowbeast View Post
Vcore1,3625V(1,344)
VTT1,25
PCH1,05
PLL1,8
vDimm1,66
Error Linx (5:15)

Failed again this time almost 2 min earlier if the times does matter at all. Glad with the support..thank you but still no stability point yet.
do with VTT on 1.27 and more vcore than the previous..like 1.37v or more..this is a bizaare batch..well you were right with me having a good binned chip..i can bench 4.4ghz with 1.4+v..tho i burned 1 pad on mine..
Edited by kairi_zeroblade - 6/2/11 at 8:58am
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post #19 of 45
Thread Starter 
Quote:
Originally Posted by ~sizzzle~ View Post
Might try backing off the vDimm. 1.60 -1.64v. More isn't always better.

Still don't see where you said what baseclock, cpu ratio and memory frequency you are going for. Assuming 200 X 20 @ 1600MHz.
Oh did I forget... sorry about that.

Multiplier: 20
BCLK: 200
Memory Multiplier: 8

Giving me 1600MHz

According to the specifications of the RAM modules they run on 1600MHz with 1.65V

I can try lower it to 1.644vDimm which will give me around 1.632vDimm though... That is why I picked 1.66 instead.
Edited by yellowbeast - 6/2/11 at 9:09am
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post #20 of 45
Thread Starter 
Quote:
Originally Posted by kairi_zeroblade View Post
do with VTT on 1.27 and more vcore than the previous..like 1.37v or more..this is a bizaare batch..well you were right with me having a good binned chip..i can bench 4.4ghz with 1.4+v..tho i burned 1 pad on mine..
Yea you lucky one

Okay I will try doing those spec.
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